Electric alarm.



W; J. KNOBLUCH.

ELECTRIC ALARM.

APPLICATION FILED 930.4,1911.

1,026,518. Patented May14,1912.

To all it may concern:

UNITED STATES PATENT OFFICE.

WILLIA JIIf-T. KNOBLOCH, OF" WASHINGTON, DISTRICT OF COLUMBIA.

Be it known that I, WILLIAM J. KNOBLOCH,

citizen ofsthe United States, residing at provements-in ElectricAlarm s, of which the following is-a specification.

i h rip i hangs an arm which is hing v with the frame. This-arm is adapted t'of Wixshingtoinin the District of Columbia, have invented certain new .and useful Im- This inventionhas" relatlon; to electric alarms especially adapted to be applied to refrigerators and the like for the purpose of sounding'a'warning when the water in pan in .a certain level.

' With -this object in view the invention consists of afr'ame ofculiar configuration which. is adapted to applied'to a fixed pzi'rt of the refrigerator and from which edly connected sustain "a float which is to be projected into the pan or removable vessel of the refrigeratbrj This arm is especially designed and is in the main insulated-from the frame, but

is provided with a finger which is adapted to haveco'ntact-with the frame, whereby an e lectric circuit is completed from a battery and buzzer mounted upon the frame.

' reference" is to be had to the following de-"- 30. scription and accompanying drawing, in

For a full understanding of the invention drawing by the same reference characters.

The frame of the alarm consists of a plate 1 which is formed preferably from I sheet metal and which is bounded about its edge with astifiening corrugation 2. The metal of which the said frame is composed is cut away forming downwardly disposed lugs 3 which are adapted to -slidably receive a battery 1 and sustain the same. 'One pole of the battery-4 is connected by means of a wire 5 with a binding post 6 mounted upon the frame. stamped up forming alug 7 which 1s adapted to cooperate with a finger of a hinged nnncrnro ALARM.

Specification of Letters Patent.

Application filed December 4, 1911. Serial No. 663,768.

the refrigerator has attained Another part of the frame is Patented iuay i, 19.12.

arm, to be explained hereinafter, for the purpose of completing an electric vcircuit through the alarm. A buzzer 8 or equivalent'alarm device is mounted upon the plate 1 and is connected with the other pole of the battery l by means of a strip 9. 1

Adjacent the buzzer 8 the metal of the sleeve 10. A hinge pin passes through the said sleeve and is insulated from. the same by insulating inaterial-12. An arm 13' is 'plate l is cut-out and "curled up forming-"a provided at its upper end with curls 14- whlch receive ithe end portions of the hinge pin 11. The said arm is provided at one side with a. finger 15 formed from the metal of which the said arni" is composed and which is adapted at times to encounter the lug/1', The said arm 13 is also provided with a finger 16 which is formed up of the metal of which the frame is composed, and

" a binding post 17 is mounted upon the finger 16. .A wire 18 connects the binding post 17 .-with the buzzer 8. Thelower portion of the arm 13 is slitted longitudinallyformingv three fingers 19 which are-bowed outwardly at their intermediate portions and which are disposed from each other at their lower ends. A ball float 20 is sustained between the fingers 19.

The device as above described is applied to a fixed part of a refrigerator and the ball 203s permitted to hang in the upper portion of the pan thereof. "When the water in the pan attains a certainlevel and comes in con- 15 thereof is brought in contact with the lug 7. Thus 1 an electric circuit is completed through the buzzer and battery and frame and their connecting parts, and the wire 18 and the arm 13 and the buzzer is excited and gives outan alarm. As soon asthe pan is removed from under the ball 20 the said ball falls by gravity and the arm 13 is swung so tact with the ball 20 the said ball is elevated, whereby the arm 13 is swung and the fingerthat its finger 15 is carried away from the lug 7 and the circuit is broken and the buzzer ceases .to sound. The arm 13 possesses .suflicient resiliency to permitthe ball 20 to slide freely over the edge of the pan as the pan is inserted under the alarm or withdrawn from under the same.

The parts are compactly assembled and may be readily applied to any known form of refrigerator or similar apparatus, and

when the battery becomesexhausted it may be read ly slipped from between the lugs 3 and 'a new one substituted inits stead.

Having thus described the inrentiomwhat:

is claimed as new is: p

1. An electric alarm comprising a frame having a battery and a buzzer located thereon, an electric connection between the bat-- tery and buzzer, an electric connection between the battery and frame, an arm hing- I edly mounted upon the frame and insulated ing provided atits lower end with longitudinally disposed slits forming fingers which are bowed at their intermediate portions awayfrom each other and which are disposed-toward each other at their lower ends,

and a ball float detachably received bet-weenthe last mentioned fingers.

2. An electric alarm comprising a frame having a battery and buzzer mounted thereon, an electric connection between the batter'y antl buzzer, an electric connection be tween the battery and the'frame, an arm hingedly mounted upon the frame and insulated therefrom, said arm being formed from a strip of sheet material, a portion of the material of which the arm is formed be ing struck up into a finger adapted to encounter'the frame at times, a second finger formed up from-the arm and a wire connecting the-lastmentioned finger with the buzzer, the strip of which the arm is formed having at its lower end longitudinally disposed slits forming three fingers which are bowed from each other at their intermediate portions and which are-disposed toward each other at their lower ends, a ball inserted between the last mentioned fingers, the said arm haring'sutficient resiliency to permit the said ball to be brushed to one side or the a other as a pan. is inserted under the same or removed from under the same.

In testimony whereof I a'f'fix my signature in presence of two witnesses.

- .lVILLIAM J. KNOBLOCH.

\Vitnesses A. E. GLASCOCK, CHAS. HOEBERT. 

